What does HD stand for in video?
AnswerHigh definition
HD means high definition: video with more pixels and detail than standard definition.
Tech · Facts & stats
HD facts & stats
7 fact-checked facts about high-definition video and images, each with the reason behind it. 5 more are in today's round and join this page after it closes.
The basics
What does PPI measure on a screen?
AnswerPixels per inch
PPI measures pixel density; more pixels per inch generally means a sharper-looking screen.
Going deeper
In 1080p, what does the 'p' stand for?
AnswerProgressive scan
Progressive scan draws every line of each frame in order, unlike interlaced video, which alternates lines.
About how many pixels are in a single 1080p frame?
AnswerAbout 2.1 million
1920 multiplied by 1080 is 2,073,600 pixels, just over 2 million.
In displays and photography, what does HDR stand for?
AnswerHigh dynamic range
HDR captures or shows a wider range between the darkest and brightest parts of an image.
Expert level
Standard-definition digital video in NTSC regions such as North America has how many visible lines?
Answer480
NTSC-region standard definition uses 480 visible lines, while PAL regions use 576.
With 8 bits per colour channel, how many brightness levels can each channel show?
Answer256
Eight bits give 2 to the power of 8, or 256, possible values per channel, from 0 to 255.
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